Apparatus for purifying foul water.



No. 807,912. PATENTED DEC. 19, 1905.

H. DESRUMAUX.

APPARATUS FOR PURIFYING FOUL WATER.

APPLICATION FILED NIB. a, 1905.

2 SHEETS-SHEET 1.

PATBNTED DEC. 19. 1905.

H. DESRUMAUX. APPARATUS FOR 'PURIFYIN'G FOUL WATER.

APPLICATION FILED FEB. 3, 1905.

2 SHEETS-SHEET 2.

HENRI DESRUMAUX,

OF PARIS, FRAN CE.

APPARATUS FOR PURIFYING FOUL WATER.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application'filed February 3, 1905- Scrial No. 244,004-

To [tZZ whom it may concern.-

Be it known that I, HENRI DESRUMAUX, engineer, a citizen of the Republicof France, residing at 35 Rue Alphonse de Neuville, Paris, in theRepublic of France,.have invented certain new and useful Improvements inApparatus for Purifying Foul Water, of which the following is aspecification.

This invention relates to a purifying apparatus in which the mixture ofthe foul water with the reagents is produced with exactness and isquickly and completely decanted.

It comprises in particular a device for distributing the solutions ofreagents, which is very simple in construction and very reliable in itsoperation and which gives at the samev time an exact proportionalitybetween the quantities of water and the solutions of reagents.

Other features of this invention will appear below.

In the accompanying drawings, which show four forms in which thisinvention may be carried out, Figure l is an elevation of a purifyingplant constructed in accordance with the principle of my invention andshowing one form of device for distributing a reagent. Fig. 2 is avertical section showing a modified form. Fig. 3 is a vertical sectionof another modified form. Fig. 4 is a vertical section, on an enlargedscale, of a part of the apparatus shown in Fig. 1; and Fig. 5 isasimilar vertical section of another modification.

In Fig. 1, a designates a water-distributing tank into which the foulwater to be purified can flow in irregular quantities. Through twoorifices b and 0, made at the same level in the tank, both having thesame height but a different width, the foul water flows, on the onehand, into a receptacle (.Z for saturating with lime and, on the otherhand, into a water-wheel e. The water is conducted to the bottom of thereceptacle (Z by a rotatable tube cl. The receptacle is provided with alimeholder 01, having a regulating-gate (Z It also has a valve (Z forcleaning.

f designates a tank of liquid reagent.

The water, saturated with lime, coming from the receptacle (Z through aspout (P, the water flowing out of the wheel 6 through a spout e, andthe reagent coming from the tank f in a manner to be described areassembled in the well-known manner in a mixing, reacting, and decantingtank g. The said reservoir is not provided with surfaces of deposit likethe decanting-reservoirs of the apparatuses now in use. To makedecantation safe in the said reservoir, it is given a predeterminedheight and a predetermined passage-section in order that the mixture inpassing upward through the reservoir shall sojourn in the same during aperiod of time at least equal to that of the chemical reactions, orabout two hours and a half, and that the upward push of the current onthe solid particles of the mixture shall be inferior to the action ofgravity on the said particles.

The mixture fed into the bottom of the reservoir through a tube isdecanted as it rises, and then it passes into a filter g located at thetop of the reservoir, and of which the filtering matter is composed ofwood fiber or of broken flint.

A valve g located at the bottom of the reservoir 9, allows of thedeposit being taken out. An overflow 1* is provided.

The tank fis provided with a distributing device comprising a smallmixing-compartment 7L, both fixed and closed, provided with aninlet-valve t'and an outlet-valve j, (see Fig. 2,) which are actuatedalternately by means of a cam k, fixed to the shaft m of the wheel 6through the medium of adouble-armed lever a, the ends of which areconnected by chains 0 0 with weighted levers p p and the balance-weightsq q of the two valves. The balance-weight of the valve j is heavy enoughto overcome the action of the other balanceweight and to cause theopening of the valve '11 when the valve j is closed.

The wheel a is provided with laterally-closed buckets and is subjectedto a certain amount of resistancefor instance, to the resistance of thewater into which the lower buckets dip at I-SO that the wheel shall turnas a watermeterthat is to say, proportionally to the volume of waterwhich flows.

At each revolution of the wheel 6 the cam it causes the alternativeopening of the valves and j, which close afterward by the action of thebalance-weights q 9, so that the compartment is filled with reagent andis then emptied into a suitable pipe or directly into the mixing-tank.The lengths of the chains are such that the chain 0 of the valve j isstill slack when the valve begins to touch its seat, so that the valve1' is not opened until after the valve 2' is quite closed and that itcloses before the valve i is opened. An invariable portion of thereagent is therefore distributed for each revolution of the wheel 6,

and consequently for a determined volume of water, that being sowhatever may be the height of the liquid in the tank f. On the otherhand, at whatever moment the foul Water may cease to flow into thepurifying plant, as one of the valves at least is closed the outflow ofthe reagent solution is completely stopped.

In Fig. 1 is shown gearing m for rotatin the tube cl and agitators do.

In a device shown in Fig. 3 the valve 1" is the only one to be actuatedmechanically by the shaft on of the water-wheel e, the other valve 2"operating automatically under the action of a float s, mounted on alever 8', located in the portioning-compartment which in this case maybe open at the top. At each revolution of the cam is the valve 1" isopened through the movements of a lever n and chain 0, so that thecompartment 72. is soon emptied of its contents. In the interval of twoopenings of the valve j the compartment 76* is filled up to a levelwhich always remains the same on account of the automatic operation ofthe floatvalve,the quantity given out by which is small when comparedwith that of the valve 1', whereby the quantity of reagent solutiongiven out by the valve 1' is really proportional to the rotation of thewheel 6, and consequently to the volume of foul water which flows. As,on the other hand, the proportion of the volumes of water passingthrough the orifices Z2 and c, placed at the same level, remains alwaysthe same, there is constantly obtained the same proportionality betweenthe quantities of foul water, of lime-water, and of reagent solution inthe mixing reservoir g. Lastly, instead of controlling the valves orother obturators by cams and levers any other suitable mechanism may beused. For instance, the levers pp of the valves (see Figs. 1 and 4)maybe connected by chains 0 0 to studs 25 t, adjustably fixed on twoworm-wheels Mu, rotated by worms 0) t, revolving with the Water-meter orthe driving-shaft e, or the same levers p 10 may be connected by rods 00 (see Fig. 5) with a T-shaped rocking device 0, which is put in motionby a rod y, connected with a Wheel 2, moved by the water-meter. In Figs.4 and 5, h designates a very narrow tube, which opens into the top ofthe compartment h and into the top of the tank f in order to allow theinflow of air into and the I claim 1. In an apparatus for purifying foulwater, the combination of a reservoir for the water to be purifiedhaving openings located at the same level and having the same height, amixing-tank, a device for saturating water with lime located in positionto receive water from one of said openings and to feed the mix- "ing-tank, a Wheel adapted to operate proportionally to the outflow of waterfrom another of said openings, means for conducting water from thelatter opening to the mixing-tank, a reagent-reservoir, aportioning-compartment connected with said reagent-reservoir, and meansoperable by said wheel for controlling the discharge of material fromthe reagent-reservoir. t

2. In apparatus for purifying foul water, the combination of areagent-reservoir, a compartment at the bottom of the said reservoir, aninlet and an outlet valve on the said compartment, a revolving shaft,two worms threaded in opposite directions on the said shaft,twoworm-wheels meshing with the said worms, two crank-plates on the saidwheels, and chains attached to the said plates to actuate the saidvalves respectively.

3. In an apparatus for purifying foul water the combination of areservoir for the water to be purified, having two openings adaptedtodischarge the same amount of water, a mixing-tank, a device forsaturating water with lime adapted to receive water from one of saidopenings and to feed the mixing-tank, a movable element operatingproportionately to the outflow of water from the other of said openings,means for conducting water from said movable element to the mixing-tank,a-

reagent-reservoir, a compartment connected with said reagent-reservoirhaving inlet and outlet valves, a shaft connected with said movableelement, and means on said shaft for operating said valves alternately,whereby liquid will pass through said compartment in proportion to themovement of said moving element.

In testimony that I claim the foregoing as my invention I havesigned myname in presence of two subscribing witnesses.

HENRI DESRUMAUX.

Witnesses:

JOHN BAKER,

outflow air from the compartment h.

MAURICE Roux.

